subnet.im

AS17353Simcoe County District School Board

CanadaRegistryARIN

As of 11th November 2026, AS17353 (Simcoe County District School Board), a network registered in Canada with ARIN, originates 4 IPv4 prefixes covering 6.4k addresses. By IPv4 address space that makes it the 13,908th-largest of the 80,743 networks we see originating IPv4, and the 376th-largest of 1,607 in Canada. It is seen behind 1 upstream network, most often AS812 (Rogers Communications Canada Inc.). None of its announcements have a valid RPKI ROA. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

4

IPv6 prefixes

0

IPv4 addresses

6.4k

IPv6 /64s

0

Upstream graph

The networks AS17353 is seen behind, one and two hops out, drawn from real AS paths.

AS17353Toward the internet core
Upstream graph for AS17353: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS17353Simcoe County Dis…This networkAS812Rogers Communicat…AS174Cogent Communicat…AS6461Zayo Bandwidth

Networks observed one and two hops upstream of AS17353 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

2

adjacent networks

Upstreams
150%
Peers
150%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS17353
NetworkCountryRelationshipPathsVantage pts
AS812Rogers Communications Canada Inc.CAPeer30476

Prefixes

The largest blocks AS17353 originates, widest first.

Largest prefixes originated by AS17353
PrefixAddressesVisibility
205.211.96.0/204.1k76/76
205.211.116.0/221k76/76
205.211.120.0/221k76/76
205.211.96.0/2425676/76

Routing health

How AS17353's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%4

Propagation

  • Globally propagated90% of full-feed peers or more100.0%4
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 4 prefixes

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS17353 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.